docs: def get_core_api():
      """
      Create instance of Core V1 API of kubernetes:
      https://github.com/kubernetes-client/python/blob/master/kubernetes/docs/CoreV1Api.md
      :return: instance of client
      """
      global core_api
  
      if core_api is None:
          config.load_kube_config()
          if API_KEY is not None:
              # Configure API key authorization: BearerToken
              configuration = client.Configuration()
              configuration.api_key['authorization'] = API_KEY
              configuration.api_key_prefix['authorization'] = 'Bearer'
              core_api = client.CoreV1Api(client.ApiClient(configuration))
          else:
              core_api = client.CoreV1Api()
  
      return core_api